Lock device for dial telephones



April 15, 1930. I R. B. POLIAKOFF ET AL 1,7

LOCK DEVICE FOR DIAL TELEPHONES Original Filed July 1, 1927' INVENTORS Raul/lime fiBA kbfl Patented .Apr. 15, 1930 UNITED STATES PATENT oF ca norms 3. ronmxorr, or New YORK, AND EMMANUEL I. LANnaEss, or BROOKLYN,

. NEW YORK :tocx DEVICE roa DIAL rn'LErno NEs Application filed July 1, 1927, Serial No. 202,821. Renewed February .10, 1980.

.This invention relates to what are known as dial telephones employing rotary, reciprocating dials, whereby the operator or user of the telephone may directly call the desired hone numberand exchange, and particulary to the provision of means for controlling the manually operated dial to prevent the use thereof by others than authorized parties or individuals; and the object of the invention is to provide a lock or control device in the form of a casin adapted to be mounted upon the dial of te telephone and locked in engagement therewith in such manner as I to prevent the use of the telephone; a fur- 'ther object being to provide a lock device which is so constructed as to prevent the detachment of the device from the dial controlled by the same, and further which will prevent the rotation of the call dial by a tool as or implement inserted into the control and lock device; and with these and other objects in view, the invention consists in a device of the class and for the purpose specified, which issimple in construction, eficient in use, and

as which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the .accompanying drawing forms apart, in which the no separate parts of our improvement are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a plan view diagrammatically illustrating the base of a telephone of the dial type, showing our improved lock device mounted thereon. I

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is a bottom plan View of the device shown in Figs. 1 and 2.

Fig. 4 is a plan view of a modified form of lock which we employ; and,

Fig. 5 is a bottom plan view of the lock shown in Fig. l.

In Fig. 1 of the drawin we have indicated at 10 in dot and das lines, the base of a telephone of the call or dial type, and

at 11, the dial portion of said case having at one point the hook-shaped stop arm 12,

and the circumferentially spaced apertures 13 inthe rotating dial 14, which is indicated in dot and dash lines in Fig. 2 of the draw ing. At 15, we have shown one of our imunderstood that the arm 12 is stationary, an

this arm serves to lock our improved device 15 against rotation on the dial in combination with the other locking means, later described.

Rotatably mounted in a bearing 20 centrally of the top face of the device, is a lock disk 21 mounted on the inner face of the top. 16, and the peripherial portion of the lock disk 21 is provided at spaced intervals with employed in the construction shown. These fingers are adapted to enter and pass through a correspondin number of apertures 13 in the rotatable 1a]. 14, and byrotating the lock disk 21, the vertical shafts 22* of the fingers 22 are adapted to be brought into position adjacent the right handwalls of. the apertures 13 as clearly seen in section in Fig. 1 of the drawing, in order to prevent rotation of the dial 14 from right to left or clockwise when our improved device is mounted thereon and in locked position, it being un derstood that said device itself is locked against movement and displacement between the stop arm 12 and the respective fin ers 22, it being further understood that w on the dial 14 is in normal position, it has no movement anti-clockwise or from left to right.

The lock disk 21 is retained in its 0 erative and inoperative positions, by provldmg at a predeterminedpoint in the periphery thereof, and intermediate two of the fingers 22, a radially extending tongue 23 formed hooloshaped fingers 22, three of which are by two radial slots 24. The outer corner portions of said tongue are turned inwardly or downwardly to a slight extent as seen at 25,

, tion of t edisk 21.

' downwardly from the material of, the top-16., in the construction shown, or may be formed in any {desiredmanner and is adapted to en-.

in order to permit of the frictional passage of said ton e over asto lug 26 in the rota-,

be u

4 g 26 is pressed age the side walls of the tongue 23 to retain the disk '21 in its several positions. The disk 21, in the construction shown, is fixed" 1m roved lock' or control device.

n the use of our improved device, and, in the o ration of placing the same upon the dial, t e figures 22 are in a position to the left -.of that shown in Fig. 8 of thedrawing, or in sitions in attaching and detaching our other words, the lock disk 21 has been rotatedanticlockwise as seen in Fig. 3 to bring the lug 26 intoengagement with the" other slot 24. In this position, the fingers 22 will pass freely through three of the holes13 in the dial 14, and the lock arm 12 will pass into the a rture 19 iii the -flange'17.of the device 15. en in this position, thekey27 is ins'erted into the bearing 20, and the lock disk'21 is rotated'to bring the same into the position shown in'Fig. 8,0f the drawing, and also repres'entedin Fi lot the drawing, in which position, the sha'n v 229 of the fingers 22 are adjacent the walls of the apertures 13. The device is now locked in osition, and cannot 'be removed from the di until the key 27 has been re-inserted, and the bearing rotated {in the opposite direction'or into the first named position, after which the device 15 may be withdrawn from the dial, and the telephone is a sin put in operation. It' will be understoo that 'any particular type of control ma be employed for engagingand operating t e lock 'sk 21 or for moyingthe fingers 22 into operativeand inoperative positions.

' a I In Figs. 4 and 530: the drawing, we have shown a modification wherein the disk 21 is pivoted to the top member 16 of the device 15 meansof a rivet bearing 29. Instead of rotating the disk-21 centrally as in Figs. 1 to '8 inclusive, we provide a key actuated latch shown in Fig. 5, is illustrated in its operative as or locked position. By inserting a key into ing the same into operative'and inoperative member'BO which is arranged and mounted the a erture 35 of the latch device 30. to rtate t e arm 31 clockwise as seen in Fi of the drawing, the disk 21'will be move anticlockwise by engagement with the shoulder 32. In moving the disk 21 from inoperative.

position to the position shown in Fig. 5, the arm 31 engagesthe shoulder 33.-

Except for the modifications above described, the device shown in Figs. 4 and 5 of the drawing, is identical in constructionwith the device shown in Fig. 3 of the drawwith three-fingers 22 and with the tongue 23 engaging. the lug26. It will also be understood that other means may be provided for moving and controlling the movement of the fingers or other locking means which may be'employed for securing the device 15 in connection with and against displacement from the dial, for the pur ose of preventing theuse of the telephone by others than au-' thorized parties.

It will also be apparent that with our improved control for t e call dial of telephones of the class under consideration, while the lock and control device prevents the use of the telephone in making a. call, it, does not, in any way, interfere withthe reception of a call. The device is intended primarily for use in preventingthe excessive use of a telephone in oflices, apartments or like places, where it is known that unauthorized parties or individuals make use of a telephone, without privilege or authority from the' subscriber. v

' It will be understood that our invention is not limited to the details-of construction herein shown and described, and various changes therein and modifications thereof, may be made within the scope of the appended claims, withoutdepartingfromthe spirit of our invention or sacrificing its advantages.

, Having fully described our invention, what we claim'as new and desire to secure by Letters Patent. is

1. The combination with the call dial of ving. In other words, the disk 21 is provided a telephone, of'a lock device mounted and supported in connection with and adapted to control the use of the operative element of said dial, means vfor preventing the displacement of said device'from said dial, said device comprising a cup-shaped body mounted directlyu on and encircling said dial.

2. A locks dial, manually controlled means -for securing said device against displacement from the dial and for retaining said dial in inoperative position, a key for controlling the operation of saidlast named means, said manually controlled means comprising a rotatable disk, and a plurality of hook-shaped fingers carried by and movable with said disk.

3. A lock device for the call dials of telcevice for the call dials of telephones comprising a cup-shaped body adapt ed to be mounted upon and encircling said ed to be mounted upon and encircling said dial, manually controlled means for securing said device agalnst displacement from the dlal and for retaimng said dial in inopera- 'tive position, a key for controlling the operation of said last named means, said manually controlled means comprising a rotatable disk, and a plurality of hook-shaped fingers carried byand movable with said disk, and

means for retaining said disk in operative and inoperative positions. 4:. The combination with the call dial of a telephone employing a rotary, reciprocating member, and a. stop arm cooperating with said member, of a lock device engaging said arm and said reciprocating member, and adapted to retaintsaid member against movement, said device comprising a cup-shaped casing mounted upon and encircling said member, said casing having a recess to receive said arm, to key the casing against rotation on said dial.

. adapted to pass through and cooperate with the reciprocating memberof said dial.

6. The combination with the call dial of a telephone employing a rotary, reciprocating member, and a stop arm cooperating with said member, of a lock device engaging said arm and said reciprocating member and adapted to retain said member against movement, said device comprising a cup'shaped casing mounted upon and encircling said member, said casing having a recess to receive said arm to key the casing against rotation on said dial, the locking'me'ans of said device comprising a hook-shaped finger adapted to pass'through and cooperate with the reciprocating member of said dial. and

means for moving said hook-shaped finger into operative and inoperative position.

.7. The combination with. the call dial of a telephone employing a rotary, reciprocating member, and a stop arm cooperating with said member, of a lock device engaging said arm and said reciprocating member andadapted to retain said member against movement, said device comprising a cup-shaped casing mounted upon and encircling said member, said casing having a recess to receive said arm to key the casing against rotation on said dial, the locking means of said device comprising a'hook-shaped finger adapted to pass through and cooperate with the reciproeating member of said dial, and means for moving said hook-shaped finger into operative and inoperative position, said means 1nvolving a key.

8. A device of the class described comprising a cup-shaped casing, the peripherial wall of which is provided with a recess, a disk rotatably mounted on the innerface oi' the top of said casing, a plurality of fingers carried by said disk, and meansnvolving a key for moving said disk clockwise and anti-clockwise into operative and inoperative positions,

and means for retaining said disk in such positions.

- 9. A device of the class described comprising a cup-shaped casing. the peripherial wall ofwhich is provided with a recess; a disk rotatably mounted on the inner face of the top of said casing, a plurality or" fingers carried by said disk and means involving a key for moving said disk clockwise and anticlockwise into operative and inoperative positions, and means for retaining said disk in such positions, said last named means comprising a spring tongue adapted to engage a lug on said casing.

l0. lhe combination with the call dial of a telephone, of a lock device comprising an inverted cup-shaped body mounted directly upon and encircling said dial, said device consisting of a top wall arranged over and concealing said dial, and a depending annular wall encircling the periphery of said dial, and said device when mounted a on the dial preventing the operation thereo 11. The combination with the call dial oil a telephone, oi a lock device comprising an inverted cup-shaped body mounted directly upon and encircling saiddial, said device consisting of a top wall arranged over, and concealing said. dial, a depending annular wall encircling the periphery of said dial and said device when mounted upon the dial preventing the operation thereof, and means engagtltl ing part of the dial for preventing the disventing the operation thereof, means engaging part of the dial for preventing the displacement of said device therefrom, and means for moving said first namedmeans into operative and inoperative position.

13. The combination with the call dial of a telephone, of a lock device comprising an inverted cup-shaped body mounted directly upon and encircling said dial, said device consisting of a top wall arranged over and encircling said dial, a dependin annular wall encirclin the periphery of sai dial, and said device wfien mounted upon the dial preventing the operation thereof, and key-actuated 5 means for engaging part of the dial to prevent the displacement of said device therefrom.

14. The combination with the call dial of a telephone employing a rotary, reciprocatm ing member and a stop cooperating with said member, of a lock device comprising an inverted cup-shaped casing adapted to be placed over and enclose said member, and engaging said arm and member to prevent the use thereof.

15. The combination with the call dial of a telephone, of a lock device involving a casing adapted to be mounted upon and entirely enclose said dial, and said casing ingo eluding means constituting a part thereof for engaging the operative elements of the dial to prevent the use thereof and to retain the casing against displacement from the dial.

In testimony that we claim the foregoing as as our invention we have signed our names this 27th day of June, 1927.-

ROUVIME B. POLIAKOFF. EMMANUEL I. LANDRESS. 

